baber/WOPTO huggingface dataset:
Patent KR-800001413-B1 (KR)
Title: Process for the preparation of purity alumina
Inventor: COHEN J
IPC: C01F7/26
Filed: 1977-01-19
Granted: 1980-12-05
Abstract: A suspension of finely ground minerals, such as bauxite or kaolin, in a soln. contg. H2SO4 49-59, (NH4)2SO4 6-8 wt. % and small amts. of other sulfates is heated for 1-5hr at 125-135≰C, filtered, the residue is washed. The filtrate and washings are concd. and cooled to give crystals of Al2(SO4)30.5H2SO4 (11-12)H2O and a filtrate, part of which is used to wash the above residue. The remainder is mixed with aq. washings from the residue and evapd. at 80≰C to ppt. a complex mixt. of Fe, Ti and NH4 sulfates. This is calcined to from Fe2O3 and TiO2; the SO3 and NH3 are recovered and recycled.
Patent KR-850000908-B1 (KR)
Title: Method for manufacturing an optical fiber preform
Inventor: IZAWA TASSUO
IPC: C03B37/012
Filed: 1979-02-13
Granted: 1985-06-27
Abstract: The soot-type glass rod is manufactured by the following apparatus. The burner (1) shich has plural concentric nozzles (11) is put on the position accorded with the rotating axis of starting materias. The starting materials are rotated. A first dopant increasing the refractive index of SiO2 glass is transferred from the central nozzle of the burner. The second dopant reducing the refractive index is transferred from the first concentric nozzle.
Patent KR-830002825-B1 (KR)
Title: 터어빈형 내연기관
IPC: C07D207/46
Filed: 1979-08-31
Granted: 1983-12-26
Abstract: 내용 없음.
Patent KR-810001403-B1 (KR)
Title: Printer
Inventor: KANG CHANG SHIK
IPC: G06K3/00
Filed: 1980-09-19
Granted: 1981-10-19
Abstract: Korean-Alphabet factor type center situation is established at three kinds of vertical center axis and horizontal center axis. Factor type is subdivided  factor type in accordance with Korean-Alphabet association.  After the carriage and Platen is made to move the horizontal, vertical movement in accordance with establishment axis, each factor association-type is moved up decide factor situation.  Then it is facterize the order of vertical center axis.
Patent KR-830001803-B1 (KR)
Title: 바인더
IPC: A01D37/00
Filed: 1980-10-19
Granted: 1983-09-12
Abstract: 내용 없음.
Patent KR-840000530-B1 (KR)
Title: Displaying device
Inventor: BLOSSFELDT DIETER
IPC: G09G3/32
Filed: 1981-02-20
Granted: 1984-04-17
Abstract: To display switched and/or operating states, control switch-luminescent diode combinations are connected at intersections of row-drive lines and column-drive lines so that the application of appropriate potentials to the drive line causes selective energization of the luminescent diodes. A plurality of controllable semiconductor switches are connected, to be driven by the column drive lines, and are connected to shunt those control switch-luminescent diode combinations that are not to be activated.
Patent KR-890002887-B1 (KR)
Title: Refractory heat-insulating slabs
Inventor: ISSOTT MARTIN J
IPC: C04B35/04
Filed: 1984-01-07
Granted: 1989-08-08
Abstract: A refractory heat-insulating slab for use in expandable inner lining of a tundish consists of (i) an anti-corrosion facing composed of magnesium, olivine periodot and inorganic binder, and (ii) a supporting facing composed of refractory siliceous material, fibre and binder.
Patent KR-860000771-B1 (KR)
Title: Process of producing uv-stabilized polyester materials
Inventor: GARWARE SHASHIKANT B
IPC: C08K5/00
Filed: 1984-01-19
Granted: 1986-06-23
Abstract: The prodn. of UV-stabilized polyesters comprises(a) heating polyester granules to 150 - 180≰C; (b) mixing a powdered UV stabilizer with the heated granules so that the stabilizer becomes attached to the granules; (c) drying the powder carrying granules to a moisture content of not more than 0.005 wt.%; and (d) forming the dried granules into film, sheet, ribbon, filament, etc. The stabilizer is chosen from o-hydroxy benxophenones, benzotriazoles, or their mixts. Pref. the granules are heated in the stage(a) to a temp. or which the surface becomes tacky.
Patent KR-900006581-B1 (KR)
Title: Touch control apparatus for electronic keyboard instrument
Inventor: YAMAUCHI TAKAO
IPC: G10H1/34
Filed: 1985-01-30
Granted: 1990-09-13
Abstract: The touch control apparatus comprises a sensor with an elongated insulating sheet (22) having a set of first and second conductive pattern films (24)(25) on a surface. The insulating sheet is folded and the set of first and second conductive pattern films are formed to be spaced apart from each other. A pressure-sensitive element (23) samdwiched in a space defined by the folded sheet so as to be in contact with the conductive pattern films. The pressure-sensitive element is operated such that electrical characteristics change according to a pressure applied to generate an output. The output is extracted by the set of conductive pattern films. Th position of the pressure-sensitive element sandwiched by the sheet is regulated with respect to the sheet.
Patent KR-900000654-B1 (KR)
Title: Transportation instrument of semiconductor water surface detection apparatus
Inventor: SONE GASUYOSI
IPC: B65G1/07
Filed: 1985-10-18
Granted: 1990-02-02
Abstract: The machine has storage housings (20,23) at its start and end points, each housing being provided with a transfer portion (21,22) for receiving and transferring elements (14) along horizontally one by one.  A chuck (17) holds the elements in a fixed condition and moves them in a given direction horizontally while they are being inspected.  Receivers (29,42) are provided for each storage housing and are movable vertically between lower and upper positions for receiving elements and transferring them between the chuck and respective storage housing.  The two transfer portions are positioned along two opposite sides of an imagined rectangle and the chuck moves along one side of the rectangle.
Patent KR-890004552-B1 (KR)
Inventor: WONG CARL Y
IPC: A21D13/00
Filed: 1985-09-09
Granted: 1989-11-15
Abstract: 내용 없음.
Patent KR-910003211-B1 (KR)
Inventor: SKIMOTO YOSHINOBU
IPC: C08J7/046
Filed: 1986-02-26
Granted: 1991-05-22
Abstract: 내용 없음.
Patent KR-890005025-B1 (KR)
Title: Orifice director plate for an electromagnetic fuel injector
Inventor: BLYTHE JAMES S
IPC: F02M51/08
Filed: 1986-05-02
Granted: 1989-12-06
Abstract: The fuel inector has a thin orifice director plate located down stream of the solenoid actuated valve.  The thin orifice director plate includes a disc of circular configuration with opposed surfaces and with a central axis.  A plurality of equally spaced apart, circular, through orifice passages are located on a circumference of a base circle positioned concentric to the central axis and aligned at right angles to the opposed surface. The material of the disc surrounding each of orifice passges is angled of the normal base plane of the disc so that the orifice passage are inclined at a predetermined angle to the central axis to direct fuel flow.  The thickness of the disc and diameters of the orifice passage provide an L(length of passage)/D(diameter of passage) ratio of 0.5 or less.
Patent KR-890005190-B1 (KR)
Inventor: KUKI KOUJI
IPC: H01J9/227
Filed: 1986-06-17
Granted: 1989-12-16
Abstract: 내용 없음.
Patent KR-890002456-B1 (KR)
Title: Control apparatus for escalator
Inventor: WATANABE EIKI
IPC: B66B25/00
Filed: 1986-06-18
Granted: 1989-07-10
Abstract: The escalator control appts. performs low speed operation in the absence of passengers at the escalator, and a high speed operation is performed in the presence of passengers at the escalator.  The alternating current of a three-phase A-C power source is converted into a three-phase alternating current of low frequency, with which an induction motor is energised to perform the low speed operation. The induction motor is rotated near a synchronous speed corresponding to the low frequency, to realize the low speed operation of high efficiency.  When passengers have been detected, the frequency of the alternating current from the converter is gradually raised.
Patent KR-930006313-B1 (KR)
Inventor: KUNKLE GERALD E
IPC: C03B5/00
Filed: 1986-06-20
Granted: 1993-07-14
Abstract: 내용 없음.
Patent KR-900003000-B1 (KR)
Title: Optical head unit
Inventor: SIKAMA SINSUKE
IPC: G11B7/125
Filed: 1986-07-23
Granted: 1990-05-04
Abstract: The optical head appts. has a light source mounted on a base element so that a light emitting end face is made flush with a front end face of the base element.  An optical incidence device diffracts a light beam emitted from the source into a number of diffracted light beams and focuses the beams to a number of spot lights on a data storage media.  The splitter is interposed in the optical incidence device for separating light beams coming from the side of the light source from reflected light beams coming from the data storage media.  A photodetector is constructed of a number of photoreceptors for receiving light beams having been separated by the splitter.
Patent KR-890000824-B1 (KR)
Title: Deodorant use for refrigerator
Inventor: HA KI-SONG
IPC: A61L9/01
Filed: 1986-09-16
Granted: 1989-04-10
Abstract: The deodorant is obtd. from impregnate-adsorption of alk. metal hydroxide (15-25 wt.%) onto activated carbon.  Thus, impregnating 6- 32 mesh granular activated carbon 100g into 1.5M KOH (or NaOH) soln., stand for 5days and dry for 24hr at 100 deg.C to give the deodorant.
Patent KR-900008955-B1 (KR)
Inventor: ABE DADAHIRO
IPC: G01B15/02
Filed: 1985-10-03
Granted: 1990-12-15
Abstract: 내용 없음.
Patent KR-950002668-B1 (KR)
Inventor: RUMREICH MARK F
IPC: H04N7/171
Filed: 1987-01-14
Granted: 1995-03-24
Abstract: 내용 없음.
Patent KR-900003791-B1 (KR)
Title: A process for the manufacture of solid fuel using waste matter
Inventor: KIM JAE-CHUL
IPC: C10L5/44
Filed: 1987-03-05
Granted: 1990-05-31
Abstract: A process for mafg. solid fuel comprises (a) mixing pulp sludge 40-50 %, cow dung 40-50 %, coal 10 % and ocher 2 % and pressing at 50 Kg/ Cm2, (b) natural drying to less than 15 % of water content, (c) forced drying to less than 3-5 % of water content, and (d) molding. The solid fuel shows 4500-5000 Kcal/Kg.
Patent KR-920000790-B1 (KR)
Inventor: ARAMAKI HITOSHI
IPC: G05B19/42
Filed: 1986-07-01
Granted: 1992-01-23
Abstract: 내용 없음.
Patent KR-900005966-B1 (KR)
Inventor: SNZUKI TOSHIRO
IPC: A23L7/109
Filed: 1986-12-23
Granted: 1990-08-18
Abstract: 내용 없음.
Patent KR-920000471-B1 (KR)
Title: Process for the preparation of aromatic copolyesteramide
Inventor: KIM KYONG-CHUN
IPC: C08G63/60
Filed: 1988-03-11
Granted: 1992-01-14
Abstract: The aromatic copolyesteramide is produced by mixing an  amide deriv. (A) contg. formula (I)  having  p-oxybenzoyl  unit  and  an benzene deriv.  (B)  contg.  formula  (II)   with   an   aromatic dicarboxylic acid (C) contg. formula (III) [Mixing mole  ratio  of (A+B) to (C) is 1:1; (A) to (B) is 1:10 - 10:1 , heat-reacting the mixt. under the N2 atmosphere at 250-300 deg.C, and  heat-reacting it at 0.1-20 mmHg and 300-340  deg.C.  The  deriv.  (A)  is  pref. 1,3- (bis(4-acetoxy benzoyle) diaminobenzene,  the  deriv.  (B)  is pref. 1,3-bis(4-acetoxy benzoyleoxy) benzene, and  the  carboxylic acid (C) is pref. isophthalic acid or terephthalic acid.
Patent KR-920000089-B1 (KR)
Title: Method of transferring a situation of the room of telephone subscriber to external computer through switchboard
Inventor: AHN GYO-HWAN
IPC: H04M11/00
Filed: 1988-06-30
Granted: 1992-01-06
Abstract: The room state is sent to a room supervising  computer  using dial digits of room telephone. The method comprises:  (A)  sending error message to a sender  when  input  digits  are  not  function digit; (B) checkiing that the next input  digits  are  room  state codes; (C) receiving a room service number when input  digits  are the room state codes, and otherwise  sending  error  message;  (D) formatting input data as transmission message  and  saving  on  an output buffer; (E) sending data to an external computer using  I/O protocol and analyzing reply message; (F) sending confirm tone  to a sender when the received data is reply message  to  the  sending message and other wise sending an error message to a sender.
Patent KR-930010597-B1 (KR)
Inventor: LONGO MARK
IPC: G09G5/14
Filed: 1988-08-13
Granted: 1993-10-30
Abstract: 내용 없음.
Patent KR-910004759-B1 (KR)
Title: The forming method of sintering powder
Inventor: SHIN HUI-TAEG
IPC: B22F3/24
Filed: 1988-10-12
Granted: 1991-07-13
Abstract: A method for forming a sintered powder layer is characterized by making a liquid mixure with  proper  viscosity  of  70-99  wt.% eutectic alloy powder which consists of 5.0 wt.% Mo, 6.5 wt.%  Cr, 1.2 wt.% P, 1.8 wt.% C, and the remainder of Fe  and  0.5-30  wt.% synthetic resin adding a solvent, spraying it on the surface of an object with an optimum thickness by spray gun, and finally,  after preheating it at  300  deg.C  for  fixed  time,  sintering  it  at 1050-1100 deg.C. In the above method, the object can be  a  carbon steel and cast iron, the synthetic resin can be a alkyd, melanine, and acryl resin with bubble formation  inhibitor  and  stabilizing agent,  and  the  solvent  can  be  a  alcohol,  acetate,  aromate hydrocarbon, ketone,  ether,  and  ester  group.  This  method  is applied for the formation of wear and corrosion resistance film on the surface of machinery parts.
Patent KR-970002751-B1 (KR)
Inventor: NAKANO YOSHITOMO
IPC: G10L11/02
Filed: 1988-11-10
Granted: 1997-03-10
Abstract: 내용없음.
Patent KR-910006680-B1 (KR)
Title: Over heating protecting circuit for t.p.h.
Inventor: KIM SOO-CHUL
IPC: H04N1/024
Filed: 1988-11-30
Granted: 1991-08-30
Abstract: A circuitry is designed to sense surfuce temperature increase of thermal printing head (TPH) and then to protect overheating  by allowing pausing time for printer using TPH. The  system  consists of microprocessor (UPU) (12)  to  control  printer,  printing  job controller (PRNC) (14), surface temperature detection  circuit  of TPH (16),  power  supply  (18)  and  TPH  (10)  including  thermal resistor output terminal.Detector circuit allows PRN (114) to vary strobe pulse width signlas (STB1....STBn) and to give these output to TPH according to detected temperature.
Patent KR-910006938-B1 (KR)
Title: Process for making beverage with chinese matrianony
Inventor: OH SANG-RYONG
IPC: A23L2/38
Filed: 1988-12-22
Granted: 1991-09-14
Abstract: A method for preparing beverage made from chinese  matrianomy comprises: (a)  washing  material  e.g.  chinese  matrianomy  (I), maximowiczia chinensis (II), ganoderna, or jujube, extracting with 5- 10 times of water at 60-100 deg.C for 2-4 hrs, and filtering  to obtain  the  ext.  contg.  water  sol.  ingredients   (III),   (b) re-extracting the each obtd. residue with 5-10 times of  80%  EtOH at 40-90 deg.C for 2-3hrs and filtering to obtain the ext.  contg. EtOH sol. ingredients (IV); (c) mixing the obtd. (III)  and  (IV), and concentrating to Brix 50 at  50  deg.C  or  less;  (d)  mixing 0.5- 1.0% ext.of (I), 1.0-1.5% ext. of (II), ganoderna ext,  jujube ext, 2-4% honey, 10-13% HFCS, 0.02-0.20% citrate,  etc  to  obtain the final product.  The  obtd.  beverage  has  a  good  taste  and flavor.
Patent KR-970005441-B1 (KR)
Inventor: IBUKA SHIGEHITO
IPC: C23C16/38
Filed: 1989-03-22
Granted: 1997-04-16
Abstract: 내용 없음.
Patent KR-930006513-B1 (KR)
Inventor: OKUSU RIYOJI
IPC: F16K1/00
Filed: 1989-04-28
Granted: 1993-07-16
Abstract: 내용 없음.
Patent KR-970000618-B1 (KR)
Title: Electro-magnetic strut assembly
Inventor: KURTZMAN ZVI
IPC: B60G17/015
Filed: 1989-05-18
Granted: 1997-01-16
Abstract: An assembly (10) for use in an active suspension system for controlling the orientation of the chassis (12) of a motor vehicle at a preselected orientation. The assembly comprises an electromagnetic device including a coil and magnetic conductive member movable with respect to the coil along an axis of relative movement between the chassis and wheel (14). The coil creates a force on the magnetically conductive member in response to a current generated by a signal control as a function of acceleration and deceleration forces applied along the axis and the relative positions of the chassis and wheel along the axis of relative movement different from predetermined neutral relative positions of said chassis and wheel.
Patent KR-910008059-B1 (KR)
Title: Car cover
Inventor: LEE GON-WOO
IPC: B60J11/00
Filed: 1989-06-05
Granted: 1991-10-07
Abstract: The apparatus  attached  on  a  passenger  vehicle,  performs various functions of a sun shade, a spoiler, and  a  simple  tent. The apparatus comprises a first  tube  (17')  of  telescopic  tube antenna (17), connected with upper connecting bar (12), lower  end (20a) of band ribbon (20) having teeth (20') and being inserted in ribbon casing  (c);  tube  housing  (18)  for  the  antenna  (17); shrinkable assembly (100) having a motor (21) with gear  (22)  and roller (R) engaged with teeth (20') of the ribbon  (20);  sunshade screen (2) with a support bar (10), combined with the bar (12).
Patent KR-940002804-B1 (KR)
Inventor: CORBAN EARLE
IPC: F16C33/51
Filed: 1989-07-27
Granted: 1994-04-02
Abstract: 내용 없음.
Patent KR-930001836-B1 (KR)
Title: Polyester and process for preparing the same
Inventor: JANG MYO-SON
IPC: C08G63/13
Filed: 1989-07-27
Granted: 1993-03-15
Abstract: An aromatic polyester of  formula  (I)  is  new.  In  (I),  n (degree of polymerization) is 5,000-50,000. Also  claimed  is  the prepn. of   (I)   which   comprises   slurry-polymerization   or melting- polymerization of 4'-acetoxy biphenyl-4-carboxylic acid of formula (II) at 230-250 deg.C for 30 mins, at 250-280 deg.C for 30 mins, at 300 deg.C for 4 hrs. or at 320 deg.C for 18 hrs.  in  the presence of tetrabutyltitanate catalyst  in  a  mixt.  solvent  of cyclohexylbiphenyl and its o-, m- or p-isomer.
Patent KR-930004398-B1 (KR)
Inventor: TANAKA TSUTOMU
IPC: F25D21/06
Filed: 1989-09-02
Granted: 1993-05-27
Abstract: 내용 없음.
Patent KR-930008498-B1 (KR)
Inventor: SHIMIZU HIDEAKI
IPC: H01L27/115
Filed: 1989-11-01
Granted: 1993-09-07
Abstract: 내용 없음.
Patent KR-920009864-B1 (KR)
Title: Making process for zinc chloride from the dust of electric furnace
Inventor: PARK YONG-U
IPC: C22B7/02
Filed: 1989-12-29
Granted: 1992-11-02
Abstract: Zinc  chloride  is  prepared  by  (a)  calcinating  the  dust discharged from steelmaking electric furnace at 500-600 deg.C  for removing flammable carbohydrates, (b) separating to  ferric  oxide and zinc salt solution by leaching the calcinated dust  with  week acid liquid, (c) removing the iron powders in zinc  salt  solution by the solvent extraction method, (d) preparing  the  concentrated zinc chloride solution by the  same  method,  after  removing  the residual impurities, (e) drying and pulverizing  the  concentrated solution of zinc chloride.
Patent KR-0172448-B1 (KR)
Inventor: CHROBACZEK MARTIN
IPC: G01D3/02
Filed: 1989-02-02
Granted: 1999-03-30
Abstract: 본 발명은 제2도의 미세한 필터링에서 고정된 각도의 2배의 샘플링에 의해 맥동량을 검출하는 장치를 제공한다.  본 발명의 맥동량 검출 장치에서, 맥동량은 의사-사인파형 변동이 얻어지도록 필터링 및/또는 댐핑된다.  이것에 얻어진 신호는 크랭크 각도에 동기적으로 1주기의 기간마다 2회 샘플링된다.  이들 2개의 측정값으로부터, 맥동량의 평균값이 제어 장치의 주기 기간마다 1회 검출된다.
Patent KR-0125621-B1 (KR)
Title: 치과용 레이저
IPC: A61B18/20
Filed: 1989-03-10
Granted: 1998-07-01
Abstract: 내용 없음
Patent KR-930002808-B1 (KR)
Inventor: OHASHI YUJI
IPC: H01L21/60
Filed: 1990-03-06
Granted: 1993-04-10
Abstract: 내용 없음.
Patent KR-920009424-B1 (KR)
Title: Diagnostic test kit and method for determination of chlamydial antigen using a membrane having surface hydroxy groups
Inventor: MAUCK JOHN C
IPC: G01N33/571
Filed: 1990-06-14
Granted: 1992-10-16
Abstract: Antigens from chlamydial organisms in specimens can be rapidly and sensitively determined using a polyamide microporous membrane which has surface hydroxy groups. This determination is accomplished by contacting extracted antigen with the polyamide microporous membrane for a sufficient time for the antigen to bind to the membrane. Antigen bound to the membrane is contacted with chlamydial antibody so as to form an immunological complex on the membrane. The presence of the complex on the membrane is then determined as a measure of the amount of chlamydial antigen present in the specimen. The use of this particular membrane improves reagent keeping and reduces background in the assay.
Patent KR-0168632-B1 (KR)
Inventor: ARON LIVNAH
IPC: A47B77/08
Filed: 1990-06-29
Granted: 1999-02-18
Abstract: 내용 없음.
Patent KR-940009682-B1 (KR)
Inventor: LYBARGER MICHAEL A
IPC: B64D33/04
Filed: 1990-07-03
Granted: 1994-10-15
Abstract: 내용 없음.
Patent KR-940007505-B1 (KR)
Inventor: IIDA MAKOTO
IPC: G11B7/085
Filed: 1990-09-27
Granted: 1994-08-18
Abstract: 내용 없음.
Patent KR-950004303-B1 (KR)
Inventor: KUNISHIMA TETSUO
IPC: B60R13/06
Filed: 1990-09-29
Granted: 1995-04-28
Abstract: 내용 없음.
Patent KR-930010920-B1 (KR)
Title: Receiver sensitivity control method
Inventor: KANG MU-SUN
IPC: H04L27/00
Filed: 1990-10-20
Granted: 1993-11-17
Abstract: The method for  controlling  the  operation  start  and  stop levels automatically with the received data signal level comprises the steps of: (a) setting the initial sensitivity by  stepping  up the turn on/ off levels as much as a first level than the  detected line signal level; (b) discriminating the effective data from  the received data; (c) resetting the sensitivity by stepping down  the turn on/off levels as much as the first  level  than  the  present received signal level when the  discriminated  data  is  effective one; (d) otherwise, comparing the present  received  data  to  the level resulting from subtracting the first level from the set turn off level; and (e) resetting the sensitivity by  stepping  up  the turn/ on off levels as much as the first  level  than  the  present received signal level when the compared level is  lower  than  the subtracted level.
Patent KR-920008302-B1 (KR)
Title: A form strucutre of dispenser-type cathode
Inventor: DO HAN-SHIN
IPC: H01J1/28
Filed: 1990-10-31
Granted: 1992-09-26
Abstract: The  impregnated-type  cathode  comprises  (a)   a   cathode substrate formed with the first metal-coated layer on the  surface of the impregnated electron emission material, (b) a reservoir for supporting the  substrate,  and  (c)  a  heater  for  heating  the substrate. The  metal  of  the  layer  is  pref.  aluminium  oxide (Al2O3), and the heater material is pref. W or Re-W alloy.
Patent KR-940002143-B1 (KR)
Title: Third group frame syncronizing circuit
Inventor: KIM JONG-HO
IPC: H04L7/00
Filed: 1990-12-31
Granted: 1994-03-18
Abstract: For effective sub-frame detection, this circuit employs a parallel detection method in which the movement of max. 4 bits is possible at a time, and comprises: a counter unit (1) to make timing and control signal for synchronization; a patten comparator (2) to compare a four bit consecutive sequence with a sub-frame pattern; a bit moving signal generater (4) to generate control signal for moving bits; a synchronization state detector (3) to transfer patterns from a synchronized state into asynchronized state if it detects consecutive error bit patterns, transfer them to the synchronized state if it detects 16 consecutive good pattterns.
Patent KR-0129858-B1 (KR)
Inventor: DAVID ROSE
IPC: C09B51/00
Filed: 1990-03-24
Granted: 1998-04-09
Abstract: 내용없음.
Patent KR-100221484-B1 (KR)
Title: Improved method for producing ibuprofen
Inventor: HENDRICKS JOEL D
IPC: C07C57/30
Filed: 1991-06-03
Granted: 1999-09-15
Abstract: A method is provided for the preparation of ibuprofen by carbonylating 1-(4 min -isobutylphenyl)ethanol (IBPE) with carbon monoxide comprising initially a reaction mixture comprising IBPE, ibuprofen and a catalyst for the carbonylation with carbon monoxide under conditions to initiate the reaction, and continuing to feed carbon monoxide to the composition to produce the desired yield of ibuprofen. Preferably the catalyst comprises palladium and a monodentate phosphine ligand. The presence of ibuprofen in the feed composition when the reaction is initiated with CO makes it possible to obtain high selectivities to ibuprofen with substantially complete conversion of IBPE at much shorter reaction times than if no ibuprofen is present initially.